I have a 05 3.0. The other day every time I would arm the car the alarm would go off after 5 min or so. This happened all night. When I got in the car that morning my compass displayed garble then it went back to nomal. I have also noticed my passanger side mirror would go to the down position while I was driving forward.

The bmw service dept kept the car for a day and couldnt figure it out. All was working fine. It has not happened again. Any ideas on what this could be?